Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 44, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 6, 2021, 6:47 PM MST for Pinal County, Arizona. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2021, 6:47 PM MST (01:47 UTC)
- Expired
- Aug 6, 2021, 7:15 PM MST
- In force
- 28 min
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 63 km from the middle of the area, began a volume at 01:48 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 1.8 hours before the alert went out and 70 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1295 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 2938 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
114
WUUS55 KPSR 070147
SVRPSR
AZC021-070215-
/O.NEW.KPSR.SV.W.0044.210807T0147Z-210807T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Phoenix AZ
647 PM MST Fri Aug 6 2021
The National Weather Service in Phoenix has issued a
* Severe Thunderstorm Warning for...
Pinal County in southeastern Arizona...
* Until 715 PM MST.
* At 647 PM MST, a severe thunderstorm was located 14 miles northwest
of Chui-Chu, or 16 miles west of Casa Grande, and is nearly
stationary.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Stanfield.
This includes the following highways...
AZ Interstate 8 between mile markers 153 and 166.
AZ Route 347 between mile markers 161 and 163.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 3289 11214 3295 11192 3279 11186 3277 11189
3276 11205 3273 11205 3272 11207 3272 11209
TIME...MOT...LOC 0147Z 257DEG 4KT 3283 11202
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
INS2 follow-up statements
051
WWUS55 KPSR 070200
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
700 PM MST Fri Aug 6 2021
AZC021-070215-
/O.CON.KPSR.SV.W.0044.000000T0000Z-210807T0215Z/
Pinal AZ-
700 PM MST Fri Aug 6 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MST
FOR PINAL COUNTY...
At 700 PM MST, a severe thunderstorm was located 13 miles northwest
of Chui-Chu, or 16 miles west of Casa Grande, and is nearly
stationary.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Stanfield.
This includes the following highways...
AZ Interstate 8 between mile markers 153 and 166.
AZ Route 347 between mile markers 161 and 163.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3289 11214 3295 11192 3279 11186 3277 11189
3276 11205 3273 11205 3272 11207 3272 11209
TIME...MOT...LOC 0200Z 257DEG 4KT 3283 11200
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
INS049
WWUS55 KPSR 070212
SVSPSR
Severe Weather Statement
National Weather Service Phoenix AZ
712 PM MST Fri Aug 6 2021
AZC021-070221-
/O.EXP.KPSR.SV.W.0044.000000T0000Z-210807T0215Z/
Pinal AZ-
712 PM MST Fri Aug 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR PINAL COUNTY WILL EXPIRE AT
715 PM MST...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Phoenix.
LAT...LON 3289 11214 3295 11192 3279 11186 3277 11189
3276 11205 3273 11205 3272 11207 3272 11209
TIME...MOT...LOC 0211Z 257DEG 4KT 3283 11199
$$
INSThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 5:48 PM MST | Special Weather Statement | PSR | 27 min | |
| Aug 6, 6:40 PM MST | Special Weather Statement | PSR | 35 min | |
| Aug 6, 6:43 PM MST | Dust Storm Advisory | PSR | Pinal | 50 min |
| Aug 6, 6:56 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 64 min |
| Aug 6, 6:58 PM MST | Special Weather Statement | PSR | 32 min | |
| Aug 6, 7:54 PM MST | Dust Storm Advisory | PSR | Pinal | 66 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.